Sphingomonas sp. Cra20 Increases Plant Growth Rate and Alters Rhizosphere Microbial Community Structure of Arabidopsis thaliana Under Drought Stress

Luo, Yang; Wang, Fang; Huang, Yongji; Zhou, Meng; Gao, Jiyun; Yan, Taozhe; Sheng, Hongmei; An, Lu

doi:10.3389/fmicb.2019.01221

Cited by 127 publications

(80 citation statements)

References 93 publications

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“…Cra20 positively affects the growth of Arabidopsis thaliana (L.) Heynh. and increases plant tolerance to drought stress [45]. Similarly, enhanced growth and improved chlorophyll contents were observed in Lycopersicon esculentum Mill.…”

Section: Discussionmentioning

confidence: 70%

Effects of Depolymerized Gellan with Different Molecular Weights on the Growth of Four Bedding Plant Species

Salachna

2020

Agronomy

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New solutions allowing for the shortening of the growing cycle and improvements in plant quality are constantly sought in order to improve the efficiency of bedding plant production under covers. Biodegradable polysaccharides and their derivatives have become increasingly popular in horticulture as plant growth promoters. A greenhouse pot experiment was conducted to evaluate the effects of depolymerized gellan of different molecular weights (MW 56 kDa and 77 kDa) on the growth and physiological parameters of ornamental bedding plants Rudbeckia hirta L., Salvia splendens Sellow ex J.A. Schultes, Scabiosa atropurpurea L., and Tithonia rotundifolia (Mill.) S.F. Blake. The results showed that the application of depolymerized gellan accelerated flowering and stimulated the growth of all assessed species, regardless of MW. The plants treated with depolymerized gellan grew higher and had greater fresh weight of their above-ground parts, higher leaf relative chlorophyll content (SPAD; soil and plant analysis development), and higher stomatal conductance (gs). The use of 56 kDa gellan fraction resulted in the formation of inflorescences with the greatest fresh weight in S. atropurpurea. Leaves of R. hirta treated with this fraction showed the highest values of SPAD and gs. This study demonstrated that gellan derivatives of low MW may be used for the production of innovative plant biostimulants.

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Section: Discussionmentioning

confidence: 70%

Effects of Depolymerized Gellan with Different Molecular Weights on the Growth of Four Bedding Plant Species

Salachna

2020

Agronomy

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“…With respect to the family Sphingomonadaceae different strains of Sphingomonas spp. have shown a positive effect on plant growth promotion [80] even under heavy metal [81] and drought stress [82]. LeFSe analysis showed the genus Arthrobacter was present in both rhizosphere plant but significantly enriched in rhizosphere of B. scandens.…”

Section: Discussionmentioning

confidence: 99%

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

et al. 2020

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The rhizosphere microbiome is key in survival, development, and stress tolerance in plants. Salinity, drought, and extreme temperatures are frequent events in the Atacama Desert, considered the driest in the world. However, little information of the rhizosphere microbiome and its possible contribution to the adaptation and tolerance of plants that inhabit the desert is available. We used a high-throughput Illumina MiSeq sequencing approach to explore the composition, diversity, and functions of fungal and bacterial communities of the rhizosphere of Baccharis scandens and Solanum chilense native plants from the Atacama Desert. Our results showed that the fungal phyla Ascomycota and Basidiomycota and the bacterial phyla Actinobacteria and Proteobacteria were the dominant taxa in the rhizosphere of both plants. The linear discriminant analysis (LDA) effect size (LefSe) of the rhizosphere communities associated with B. scandens showed the genera Penicillium and Arthrobacter were the preferential taxa, whereas the genera Oidiodendron and Nitrospirae was the preferential taxa in S. chilense. Both plant showed similar diversity, richness, and abundance according to Shannon index, observed OTUs, and evenness. Our results indicate that there are no significant differences (p = 0.1) between the fungal and bacterial communities of both plants, however through LefSe, we find taxa associated with each plant species and the PCoA shows a separation between the samples of each species. This study provides knowledge to relate the assembly of the microbiome to the adaptability to drought stress in desert plants.

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“…Sphingomonas are widely distributed in nature, having been isolated from plant root systems and other sources. Reports showed that Sphingomonas stimulates the growth plants through phytohormone production, nitrogen fixation and driving developmental plasticity in the roots (Yang et al, 2014;Luo et al, 2019). Additionally, Sphingomonas was also shown to alleviate salinity stress in plants (Khan et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Streptomyces lydicus M01 Regulates Soil Microbial Community and Alleviates Foliar Disease Caused by Alternaria alternata on Cucumbers

Wang

Xue

et al. 2020

Front. Microbiol.

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Due to the adverse effect on the environment caused by excessive use of chemical fertilizers, the development of sustainable agriculture attracts a growing demand of biological based fertilizers composed of living microorganisms. In this study, an Actinobacteria Streptomyces lydicus M01 was isolated from the rhizosphere soil of Pyrus calleryana. This strain effectively promoted the plant growth and suppressed a foliar disease caused by Alternaria alternata on cucumbers. S. lydicus M01 exhibited growth promoting characteristics such as phosphate solubilization, IAA secretion, siderophore and ACC deaminase production. Through Illumina sequencing of the 16S rRNA gene and ITS gene of the soil microbes, we found that the application of S. lydicus M01 altered the composition of the microbial community by promoting beneficial groups, including bacteria genera Pseudarthrobacter, Sphingomonas, Rhodanobacter, and Pseudomonas, fungi genera Fusicolla, Humicola, Solicoccozyma, and Paraphaeosphaeria. Most of these bacteria and eukaryotes exhibit positive effects on growth promotion, such as nutrient accumulation, auxin secretion, abiotic stress alleviation, biological control, or bioremediation. Furthermore, studies on the reactive oxygen species (ROS) level and antioxidants of cucumber leaves revealed that S. lydicus M01 treatment reduced the ROS accumulation and increased the activities of antioxidases related with ROS scavenging, which indicated an enhanced disease resistance of cucumbers under biotic stress. Thus, our results suggest that the application of S. lydicus M01 can systemically affect plant microbiome interactions and represent a promising sustainable solution to improve agricultural production instead of chemical fertilizers.

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Sphingomonas sp. Cra20 Increases Plant Growth Rate and Alters Rhizosphere Microbial Community Structure of Arabidopsis thaliana Under Drought Stress

Cited by 127 publications

References 93 publications

Effects of Depolymerized Gellan with Different Molecular Weights on the Growth of Four Bedding Plant Species

Effects of Depolymerized Gellan with Different Molecular Weights on the Growth of Four Bedding Plant Species

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

Streptomyces lydicus M01 Regulates Soil Microbial Community and Alleviates Foliar Disease Caused by Alternaria alternata on Cucumbers

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